Amplificator Class A 2 X EL504

[jean michel]

hello ,

i me stocked 2 tubes EL 504 for build amplificator 2 ways to EL504 .

i research montage to single ended ( for use 2 ways ) ?

i me research to Google.com , not good research completed to value schématic and spécification

sorry , me english is bad .

http://www.diyaudio.com/forums/attachment.php?attachmentid=341336&stc=1&d=1365447815

me tested basic montage to 1 EL 504 to 34 V - 6.3 V , not possible test , so possible error ?

 

[wfmali]

This might help to get you started:

EL504 Translation

Marcus

 

[jean michel]

This might help to get you started:

EL504 Translation

Marcus

hello ,

tks for translate info , me looking the montage and looking specifique data .

 

[Ketje]

Why don't you try your luck at the Elektor (french) forum?
They are very activ with tube-amplifiers
Tubes audio - ELEKTOR.fr | Électronique : Analogique Numérique Embarqué Microcontrôleurs Audio Test Mesure
Mona

 

[jean michel]

Why don't you try your luck at the Elektor (french) forum?
They are very activ with tube-amplifiers
Tubes audio - ELEKTOR.fr | Électronique : Analogique Numérique Embarqué Microcontrôleurs Audio Test Mesure
Mona

hello ,

me looking the forum " Elektor " , no link to amplificator to base EL 504 !

hehehe , me research is slow ...

no problem , so instrutive research to " Google " to Home Made .

thank

 

[Cookj]

Try this site

Bienvenu(e) sur AuDIYoFan.org

John

 

[jean michel]

hello ,

me build is up

me joint 2 pictures to 1 for " HT " & 1 for use " EL / PL 504 " .

http://www.diyaudio.com/forums/attachment.php?attachmentid=343503&stc=1&d=1366350441

http://www.diyaudio.com/forums/attachment.php?attachmentid=343504&stc=1&d=1366350441

so good for test no up for very good up power , me problem is charged for good use valve to datasheet !

 

[jean michel]

hello ,

me build is stop it

so me transformator is very little for good use power , no probleme , the " solution " , HT to 180 V= is downgrade to good 90 V=

me news build to short listing matérial .

2 PL 504 for connected to left and right to 90 V= , use 24 V~ to filament .

me power to 8 Ohms , is very little , use 0.0.. Watts RMS !!!

so not problem , is not drive installed for test .

me montage to screen .

slow build is good appréciate to search link for build .

me first build , i me newbie , no problem , so looking build for up me good build .

bye all

ps : me test to video ...

2 PL 504 en stéreo - 80 V= - Vidéo Dailymotion

 

[jean michel]

hello all ,

a stable version with my new transformer, j has to re-modify my assembly(editing) for obtenri moves forward badly because I am not good at arithmetic complex, me the power of mwatts 500, him(it) takes(brings) out in 2 x 8 ohms, have there some more of work has to make put the assembly(editing) is stable and he(it) have there not of 12 AX 7 d to use in l imédiat.

Has bientot

 

[Ketje]

Two remarks,
you draw a loadline for triode-config,where your schematic shows a penthode-connection.
You can't use a 230/12V mainstransformer with a SE stage.The bais-current will saturate the core.
Mona

 

[jean michel]

hello ,

the build is upgrad for the test , the graphic is news .

and transformator " impédance " is 225 Ohms primary to 2 Ohms secondary ; me use 8 Ohms to speaker , not saturate voice !

no problem , so test for upgrad me build , only , no build transformator adapted .

tks

 

[jean michel]

hello All ,

me project to amplificator 2 X EL/PL 504 is stopped !

i me very dificulte problem to calculate curve charge and excursion for use 12 AX 7 / ECC 83 .

the project is std-by and news project to use ECL 805 is créate ( copy to base ECL 86 ) .

the schéma for news build ... so éasy build , me juste change component for test and use .

me test is good and me ajusted to test power to news project ...

4.16 W rms to 6 ohms impédance HP so 1 Khz , litle problem for max power !

many thanks for all , good day

 

[jean michel]

hello ,

i me resumed(took back) the assembly(editing) of my EL / PL 504, which is the risk d to use an audio transformer of 5 K on l anode

so only SE not use PP , me look EL 36 , not build SE ...

TKS for all

 

[TURING]

I'm trying to do a 6P12P (EL504) single-ended amplifier. See my other posts, the load impedance 3.5K, supply voltage 290v, plate current of 60mA.

http://www.diyaudio.com/forums/tube...gs-new-tube-amps-please-give-staff-about.html

 

[TURING]

Output power can go to 2.8W, I draw the load line is very thin, I hope you can see it.

 

[kevinkr]

Jean Michelle, choisi un vrai transformateur de sorti aproprie pour ta lampe avec simple PL504.. N'est pas possible a reussi avec trafo d'alimentation..

Translated: Choose a real output transformer appropriate for the single tube PL504. Not possible to succeed with power transformer.

My French is soooo rusty..

 

[TURING]

EL504 in triode mode has a very good curve, very unfortunately it is only G2 voltage 250v. Partial substitution models can reach 275V.

 

[TURING]

Depending on your point of view the output of the power transformer 185v you should use the 1000-ohm impedance output transformer, and the plate current is adjusted to 100mA, then the distortion of about 7%, power 3.2W

 

[TURING]

1k:8-ohm
185v power
Gate voltage-20v, anode-to-cathode voltage of about 165v, the load curve.If the impedance can be selected such that it is indeed the best. I use 3.5k-ohm, 285v out of frustration, just have these hands, and watched the curve pretty good, but some of the output power is small，only2.6W.

 

[jean michel]

hello ,

many thanks , so me English is bad ... lol

it is possible use Transformator " Torique " or not EI ?

me possible use transformator torique to 230 V ac and 2 x 6 V dc for use EL /PL 504 !

Or then I to find custom-made transformer?

tks for all